Data transmission device



FIG. 1—is a perspective view of the data transmission device according to our invention;

FIG. 2—is a front view thereof,

FIG. 3—is a left view thereof,

FIG. 4—is a right view thereof,

FIG. 5—is a bottom view thereof,

FIG. 6—is a top view thereof; and,

FIG. 7—is a back view thereof.

The surface shown between the broken and solid lines in FIG. 7 forms no part of the claim.

The broken lines shown in FIG. 7 depict parts of the data transmission device that form no part of the claim. 

CLAIM The ornamental design for a data transmission device, as shown and described. 